Window structure



June 10, 1930.

W. J. KLEMM wmnow STRUCTURE File dApr'il 19, 1929 2 sheets-sheet 1 June 10, 1930.. w. J. KLEMM 1,762,993

WINDOW STRUCTURE Patented June 10, 1930 7 NITED? STATS wrLLI M J. KLEMM, coMP nY,

App1ication filed A ril 19,

' washing from the inside ofthe building. r

shown in Fig. ,3',.and.

struction for securely automatically locking The important object of the invention is to provide simplified and more eflicient conthe sash against vertical movement when-it is swung to inclined position, and to balance the weight of the sash'when inclined sothat it can be more easily manipulated.

The above and other features of my inventionare incorporated" in the structure shown. on the drawings in which 1 Fig. 1 is a front'elevation' of a window frame with thesash therein; f

Fig. 2 is a sectional view on.plane-2-'2 Fig. 1; I Fig. 3. is an enlarged side elevation of the A lower end of a runner showing my improved locking arrangement;

Fig. 4. is a front elevation of the. parts Fig. 5 is a side elevat on of a sash supporting "arm; 1

The window frame F, shown, ed of sheet metal and comprises-fa sill the. head'11,'and the jambs 12. The jam'bs have the inner and outerchannels-13 and14 for guiding the runner structure's R'to which the window sashes Sarerattached to move: vertically therewith or to swing thereon.

Each runner structure comprises a length secured to of channel bar 15 having at the lower end of its web a pivot hole'l6 for receivingthe pivot pin sponding sash supporting arm 18, these arms being preferablyyof metal and of channel form.

for receiving the supporting arms "and "screws or other suitable 'ineans' will detachably secure the' sash against displacement. A l i Pivoted to is pivoted to a slider block or plate. 22 slid swing of thewindowsash.

to each slider block and extends j around a, sash pulley 26 to 'a sash-weight (not shown) in a welliknown manner, the

-olthe inner g 'provid'ed is construct-f 7 pp r 17 at the inner endfof the corre- As shown in Figs. 1 and 2 the'sashes I- have longitudinal grooves'19 at their edges;

each supporting arm intermedif ate itsends is a fiat bar 21whoseupper end p g I through opening 30 andtorce 151111301210.

' wInnow isrnnczrnnn 1929." sen a1110456398. H

the respective channel able "longitudinally 1a 23 extending through bar 15, the pivot pin or cnIc so, rumors, Assrenon TQ- mInA MANUFACTURING or CHICAGO, ILLINOIS, A oonroR TIon or ILLINOISX.

a'slot-24c in the. channel bar'web,'thisxslot Y I limiting the travel of the slider .blockan'd consequently the distance of downward vA chain or 'chord'j 25 is secured sash weights'balancing the; weight *of'the bars 21 balancingthe swinging movement off upwardly from a swing downposition;

,602. "sash as it is raised orflowered in its guide-z channels-l3 or 1 1,: and by the. pull on'ithe -'When' the sash" is verticalthe pull of the,

ment of the pivot pins 23:..with'the. upper ends of the slots 24:; but preferably-stop members" 27 are secured in the channel bars Sash Weights may be taken up h'e engage against which the slider blocks may abut Ti and so take the strain from when the sash is'vertical.

' the pivot pins f II shall'mw describe the mechanism rol -r holding the runner structures against'vert'i-i cal movement when a sashis swungtozmclined position. The pivot pins 17 are each: with a cam-projection QSYEOT'OIlbrake shoe 29 The shoe plays in gaging a 30 in' the inner flange of the the opening channel vbar 3, 1 15 andfis vcarried by a lever- 31 1 shown in the form of a platepivoted at its end by'apin 32'extending from the channel bar web. To strengthen the lower end; of the fchannel bar and provide a more rigid seat for the lever,';a plate 33 *may be the channel bar web by riveting or welding; f v Y .The lower'end 29153? the brake shoeior" A flange exten'dsa distance, belowthe .lower."

end of the lever plate .31 to be in the, path of the cam projection 28; When a sash is vertical .the ,cam'projection' extends-up wardlyv as shown, in connection with the 1 upper sash Fig. 2,]andJby dottedlines in Fig. 3'.

end 29 ivot 32 to project the shoe outwardly- When the sash is i swung 'dow nwardly the cam projectionengages the shoe andthe lever ,31 is swung on its v tional engagement with the inner side of the the sash weights.

adjacent stop a on the window frame and such engagement will lock the sash against vertical movement while it is in inclined position. To localize the braking pressure to givethe shoe a firmer hold on the stop I preferably provide a projection 34; on the shoe and this projection may be at the upper end of the shoe between the shoe end 29 and the pivot 32 so that the resulting leverage will multiply the cam pressure and produce powerful pressure .of the projection 34cagainst the window frame stop.

In order to make the braking pressure uniform for substantially all angular positions of' a sash the end 29 of each shoe has the concave surface Z2 substantially concen-.

tric'wit'hthe pivot pin 17 When the sash is verticalthe cam ends 28 are above these surfaces but as soon as the sash is swung downwardly the cam ends force the shoes outwardly into braking engagement with the stops a and then engage with the concave surfaces 1) so thatthe applied braking pressure remains uniform and injury to the stops will be avoided.

To permit compensation for wear of the brake shoe projections 34: I provide means for adjusting the swing center of the lever 31. The. opening 35 receiving the pivot pin- 32 is laterally elongated sothat the swing center may be shifted laterally. To

hold the adjustment and to form a fulcrum abutment for the lever a wedge 36 is inserted between. the lever end and the rear flange of the channel bar 15, the lever end being rounded where it engages the wedge surface 0 to reduce friction. The wedge shown' is in the form of a plate held in position by a screw 37, the screw extending through: an elongated opening 38 in the channel bar web and reinforcing plate 33 sothat the wedge may be adjusted longitudinally to shift the fulcrum abutment of the brake shoe lever 31 laterally to com pensate'for wear of the brake shoe. After setting of the wedge it is rigidly secured by tightening the screw 37 which threads therethrough.

'VVhen a sash is within its window frame guides the cam ends are in position to permitmthe brake shoe structures to' assume their inner positions as indicated on the upper sash inFig. 2 and by dotted lines Fig. 3, and the. sash is free for vertical movement in its guides and is balanced by From any vertical position. of a sash it can be swung downwardly and. the cams will then engage with and swing the. brake structures which at their upper ends fulcrum against the wedges and the brake projections 34 will be forced against the frame stops to lock the sash against vertical movement. In the arran'gement shown, the limit of downward swing of the sash is to a horizontal posi tion, the pins 23 of the bars 21 then engaging with the lower ends of the slots 24.

During engagement of the cams with the concave surfaces 6 of the brake lever structures the sash may be swung-to intermediate positions without releasing of the braking and bars 21. hen the sash is'swung up close to vertical position the cams will release the brake shoe structures and then the sash is again free for vertical movement in its guides.

As shown in Fig. 4 the pivot pins 17 may be rigidly secured in the supporting arms 18 by welding as indicated at 39. A washer 40 is inserted between each arm and the respective runner structure to leave clearance for the corresponding bar 21. To permit ready application of the arm to the runner structure the pivot opening 16 for the pivot pin 17 is extended to form the passage 11 for the cam projection 28. This passage is angularly situated so that after insertion of the pivot pin the arm 18 will be held in operative position by the engagement of the cam projection against the plate 33.

Removal of a sash for reglazing or repairs can'be. readily accomplished by withdrawing the scre'ws20 and sliding the sash from the arms 18, and the sash can as readily be reapplied to the arms.

, I thus provide simple, eflicient and. economically manufactured window structures which are strong and durableand in which the sash can be easily manipulated and adjusted without undue exertion. I do not desire to be limited to the exact construction,.arrangement and operation shown and described as modifications can be made which will come within the scope of the invention.

1. In window structures, the combination of a window frame having upright side channels, runners slidable in said, channels,

a window sash pivoted to said runners to swing relative thereto into open or closed position, window weights connected. with said runners, brake shoe structures pivoted on said runners, and cam projections on said sashes rotated during swinging movement'of a sash to open position to swing and force said brake shoe structures into braking engagement with the sides of said channels.

2. In a window structure, the combination of a window frame having upright side channels, runners slidable in said channels, window sash pivot pins pivoting said sash to said runners tofswing relative thereto into-open or closed position, brake shoes in said runners, said runners having openings through which said brake shoes may bepro-' 3. In a window structure, the combination of a window frame having upright side channels, runners slidable in said channels, a window "sash pivoted to said runners to swing vertically into open or closed position, a lever in each runner, a brake shoe on each lever, said runners having openings adjacent to said brake shoes, and cams rotated upon swinging of said sash to open position to actuate said levers to cause the'bra'ke shoes to be projected through said openings into friction engagement with the sides of said channels to thereby look said sash against vertical movement in said channels.

4. In a window structure, the combination of a window frame having upright side channels, runners slidable in said channels, a window sash pivoted to said runners to swing relative thereto, brake shoes pivoted on said runners, and cams concentricwith.

the sash pivot axes and rotated into engagement with said shoes when said sash is swung downwardly to swing and force said shoes into braking engagement with the sides of said channelslto thereby lock-said runners against vertical movement. 1

'5. In a window structure, the combination of a window frame having side channels,

runners slidable in'said channels, a window sash P1V0t6d' at its lower corners to said runners, said sashbeing adapted to swing upwardly into closed position'or downwardly lnto open posltion, each runner having a longitudinal slot, bars secured to saidsash,

runners slidable in saidchannels, a window 1 sash having pivot pins at its lower corners journaled in said runners to adapt said sash to swing vertically relative to said runners, a brake lever in each runner having a brake shoe, and a cam projection on each pin for cooperating with the respective brake lever to cause actuation thereofto force its brake shoe into engagement with the channel side to lock the runner against vertical movement when the sashis swung open.

7 .In a window structure, the combination-of a window frame. havin side channels, runners slidable in said channels, a window sash havingi pivot pins journaledin said runners to adapt said sash to swing vertically, a brake shoe pivoted on cacherunner, cams rotatedby said pins to swing and forcesaid shoes 1nto bralnng engagement with the channel sides when said sash is swung down whereby said sash w ll be I looked; against vertlcal movement, and:

means for adjusting the pivot axis of each brake shoe to compensate for'wear of the shoe.

8. In a wlndow structure, the'combinationof a window frame havingvertical side channels, runner frames slidable in said channels, each runner-frame having a pivot opening at its lower end, supporting arms having pivot pins journaled in said pivot openings, a sash detachably secured to said arms to swing therewith relative to 'said.

runner frames, a brake lever pivoted at its upper end on each runner frame, a cam projection on each pivot pin for engaging the lower end of the respective lever to swing the lever when the sash is swung downwardly, and a brake shoe on each lever forced into braking engagement with the adjacent channel the lever. V I I I 9. In a window structurefthe combination of a window frame having vertical side channels, runner frames in said channels having each a pivot openlng at its lower end, supportlng arms havlng plvot plns journaled in said vpivot openings, a window sash supported by said arms for swing relat1ve to said runner frames, a brake lever on side during such swing of V each runner frame pivoted at its upper end, 1

a cam projection on each pin for engaging the lower end of the respective lever, a brake shoe intermediate the ends of each lever, said cam projections swinging said levers to force said shoes into 'braking'engagement with the channel sides when the sash is swung down whereby to lock the a runner frames against movement in said 1 channels, and means for adjusting the pivot axis of saidlevers 1r compensate for wear on said brake shoes.

swing vertically into open or closed position, a brake lever in each runner pivotally supported at one end, camsrotated upon swinging, movement of the sash to engage a with the other ends of said levers to swing said levers when said sash is swung downwardly, and brake shoes on said-levers in termediate their ends forced into braking 2.15" 10. Ina window structure, thecombinaf, tion of a window frame having upright. channels, runners slidable in said channels, a window sash pivoted to said runners to bination of a window frame having side channels, runners slidable in said channels, a window sash pivoted to said runners to be swung upwardly into closed position or downwardly into open position, side bars pivoted to said sash, a slider block in each runner connected with the respective side bars whereby Vertical swing of said sash will cause longitudinal movement of said slider blocks in said runners, and sash weights connected with said slider blocks for balancing the weight of said sash during swing thereof.

In witness whereof, I hereunto subscribe my name this 3rd day of April, 1929.

WILLIAM J. KLEMM. 

